1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0821d18c573a65eb6a0e34e6bd8503a50749645d709cc2aa48d40b56078fc584. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/891a3369-e3aa-48b9-9ad5-a3a21a896562.json and https://artists.proofprofile.net/proofs/artist/891a3369-e3aa-48b9-9ad5-a3a21a896562.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518858a456fc1316c5d9d04c631287d82d9b47149d89f0764a26cf724a534e33. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47282eb84c48efa3edb6a948b514569dd94b340ae48f69fac0b7a6aed8b1f3ee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89789ba7809421d608c72998bb7d988cb0059911ac693bc234bf582865761371. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04e17a3c31f9efd26996014ccc5596c3aa38b85b17cc42c29c2351f5c260ca4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933f6c1c5204edf4c34da635f1ef45c88d5842abb921a371a4fa9eb56cb01f8c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29f7a839e87ee8cf370bd1f58734e626fd3aedd3499007565af9e7cb1810e3c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc78cf16226551aa41f8f550dbcee7bc8c78b9e2ec578d1bb43400973651f7d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b96c565626ea30fcf78f8fd678ce93864127a2fe6c5afb07a3397c95c96df1a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d23f8e1dae4a16e3518535ce98e11eb016fde1af0ff7646f3e9ce8a13818b75. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2971ed866ae8c85489da536637bc3fa4518b8e7068f4493bfe30a4f38747e51b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ed9323db221f18e2aa067c732b1363b56301d0aeaa78d232b5f860dbb16f7d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:41:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52554336.